Convert (ArrayLists) in java android
0
If I have Arraylist<Integer> how can I do convert it to ArrayList<String>
final ArrayList<Integer> arrayList =
new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
the Toast did not print any think on the Screen
ListView listView=findViewById(R.id.arraylistv);
final ArrayList<Integer> arrayList=new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
final ArrayAdapter< Integer> arrayAdapter =new ArrayAdapter<Integer>(this , android.R.layout.simple_list_item_activated_1,arrayList);
listView.setAdapter(arrayAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),"your num is "+arrayList,Toast.LENGTH_LONG);
}
});
java
android asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
add a comment |
0
If I have Arraylist<Integer> how can I do convert it to ArrayList<String>
final ArrayList<Integer> arrayList =
new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
the Toast did not print any think on the Screen
ListView listView=findViewById(R.id.arraylistv);
final ArrayList<Integer> arrayList=new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
final ArrayAdapter< Integer> arrayAdapter =new ArrayAdapter<Integer>(this , android.R.layout.simple_list_item_activated_1,arrayList);
listView.setAdapter(arrayAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),"your num is "+arrayList,Toast.LENGTH_LONG);
}
});
java
android asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
1
It's already anArrayList?
– flakes
Nov 23 '18 at 21:39
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
Do you mean how to populate aListwith values usingasList? Then you miss the static importjava.util.Arrays.
– Glains
Nov 23 '18 at 21:43
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39
add a comment |
0
0
0
If I have Arraylist<Integer> how can I do convert it to ArrayList<String>
final ArrayList<Integer> arrayList =
new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
the Toast did not print any think on the Screen
ListView listView=findViewById(R.id.arraylistv);
final ArrayList<Integer> arrayList=new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
final ArrayAdapter< Integer> arrayAdapter =new ArrayAdapter<Integer>(this , android.R.layout.simple_list_item_activated_1,arrayList);
listView.setAdapter(arrayAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),"your num is "+arrayList,Toast.LENGTH_LONG);
}
});
java
android asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
If I have Arraylist<Integer> how can I do convert it to ArrayList<String>
final ArrayList<Integer> arrayList =
new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
the Toast did not print any think on the Screen
ListView listView=findViewById(R.id.arraylistv);
final ArrayList<Integer> arrayList=new ArrayList<Integer>(asList(19,85,955,9,2,62,96,2,6,26,2,26,2));
final ArrayAdapter< Integer> arrayAdapter =new ArrayAdapter<Integer>(this , android.R.layout.simple_list_item_activated_1,arrayList);
listView.setAdapter(arrayAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),"your num is "+arrayList,Toast.LENGTH_LONG);
}
});
java
android java
android asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
edited Nov 23 '18 at 23:08
Eslam Magdy
asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
asked Nov 23 '18 at 21:33
Eslam MagdyEslam Magdy
63
63
1
It's already anArrayList?
– flakes
Nov 23 '18 at 21:39
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
Do you mean how to populate aListwith values usingasList? Then you miss the static importjava.util.Arrays.
– Glains
Nov 23 '18 at 21:43
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39
add a comment |
1
It's already anArrayList?
– flakes
Nov 23 '18 at 21:39
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
Do you mean how to populate aListwith values usingasList? Then you miss the static importjava.util.Arrays.
– Glains
Nov 23 '18 at 21:43
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39
1
1
It's already an
ArrayList?– flakes
Nov 23 '18 at 21:39
It's already an
ArrayList?– flakes
Nov 23 '18 at 21:39
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
Do you mean how to populate a
List with values using asList? Then you miss the static import java.util.Arrays.– Glains
Nov 23 '18 at 21:43
Do you mean how to populate a
List with values using asList? Then you miss the static import java.util.Arrays.– Glains
Nov 23 '18 at 21:43
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39
add a comment |
1 Answer
1
active
oldest
votes
4
You can use streams to easily convert type of a List, like this:
List<Integer> input = Arrays.asList(19,85,955,9,2,62,96,2,6,26,2,26,2);
List<String> result = input.stream().map(String::valueOf).collect(Collectors.toList());
In this case, we're using map to convert each element using String::valueOf - which basically is a function that converts the input into a string. You can replace this with any other function to convert the input type to other types.
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
1
If you really need to to be anArrayListyou can also doinput.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))
– flakes
Nov 23 '18 at 22:46
add a comment |
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1 Answer
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
4
You can use streams to easily convert type of a List, like this:
List<Integer> input = Arrays.asList(19,85,955,9,2,62,96,2,6,26,2,26,2);
List<String> result = input.stream().map(String::valueOf).collect(Collectors.toList());
In this case, we're using map to convert each element using String::valueOf - which basically is a function that converts the input into a string. You can replace this with any other function to convert the input type to other types.
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
1
If you really need to to be anArrayListyou can also doinput.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))
– flakes
Nov 23 '18 at 22:46
add a comment |
4
You can use streams to easily convert type of a List, like this:
List<Integer> input = Arrays.asList(19,85,955,9,2,62,96,2,6,26,2,26,2);
List<String> result = input.stream().map(String::valueOf).collect(Collectors.toList());
In this case, we're using map to convert each element using String::valueOf - which basically is a function that converts the input into a string. You can replace this with any other function to convert the input type to other types.
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
1
If you really need to to be anArrayListyou can also doinput.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))
– flakes
Nov 23 '18 at 22:46
add a comment |
4
4
4
You can use streams to easily convert type of a List, like this:
List<Integer> input = Arrays.asList(19,85,955,9,2,62,96,2,6,26,2,26,2);
List<String> result = input.stream().map(String::valueOf).collect(Collectors.toList());
In this case, we're using map to convert each element using String::valueOf - which basically is a function that converts the input into a string. You can replace this with any other function to convert the input type to other types.
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
You can use streams to easily convert type of a List, like this:
List<Integer> input = Arrays.asList(19,85,955,9,2,62,96,2,6,26,2,26,2);
List<String> result = input.stream().map(String::valueOf).collect(Collectors.toList());
In this case, we're using map to convert each element using String::valueOf - which basically is a function that converts the input into a string. You can replace this with any other function to convert the input type to other types.
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
answered Nov 23 '18 at 22:20
KreaseKrease
11.6k74160
11.6k74160
1
If you really need to to be anArrayListyou can also doinput.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))
– flakes
Nov 23 '18 at 22:46
add a comment |
1
If you really need to to be anArrayListyou can also doinput.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))
– flakes
Nov 23 '18 at 22:46
1
1
If you really need to to be an
ArrayList you can also do input.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))– flakes
Nov 23 '18 at 22:46
If you really need to to be an
ArrayList you can also do input.stream().map(String::valueOf).collect(Collectors.toCollection(ArrayList::new))– flakes
Nov 23 '18 at 22:46
add a comment |
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1
It's already an
ArrayList?– flakes
Nov 23 '18 at 21:39
What do you mean? As flakes said it is already an ArrayList? How do you convert an int to an int?
– Ishaan Javali
Nov 23 '18 at 21:41
Do you mean how to populate a
Listwith values usingasList? Then you miss the static importjava.util.Arrays.– Glains
Nov 23 '18 at 21:43
target array contains String and not Integer? you maybe could try something like that : 'listInt.stream.map(String::valueOf).collect(Collectors.toList())'
– boly38
Nov 23 '18 at 22:18
what have you tried so far ? where is your code ? switching from Integer to String is very well documented all over the internet, did you search into the java doc or java online courses ?
– LoneWanderer
Nov 23 '18 at 22:39